Finding the Fourth Proportional to 9,408.18, 12,983.88 and 5,216.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,408.18 : 12,983.88 = 5,216.43 : x
2. Step 2: Convert to fraction form
   9,408.18/12,983.88 = 5,216.43/x
3. Step 3: Cross multiply
   9,408.18x = 12,983.88 × 5,216.43
4. Step 4: Simplify right side
   9,408.18x = 67,729,475.07
5. Step 5: Solve for x
   x = 67,729,475.07/9,408.18
6. Step 6: Final answer
   x = 7,199.00